12127127 has 4 divisors (see below), whose sum is σ = 12197400. Its totient is φ = 12056856.

The previous prime is 12127109. The next prime is 12127139. The reversal of 12127127 is 72172121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12127127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34877 + ... + 35222.

It is an arithmetic number, because the mean of its divisors is an integer number (3049350).

Almost surely, 2^12127127 is an apocalyptic number.

12127127 is a deficient number, since it is larger than the sum of its proper divisors (70273).

12127127 is an equidigital number, since it uses as much as digits as its factorization.

12127127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70272.

The product of its digits is 392, while the sum is 23.

The square root of 12127127 is about 3482.4024753035. The cubic root of 12127127 is about 229.7484774040.

Adding to 12127127 its reverse (72172121), we get a palindrome (84299248).

The spelling of 12127127 in words is "twelve million, one hundred twenty-seven thousand, one hundred twenty-seven".